Stump-extractor



(No Model.)

Patented Feb. 10,1891.

em M 0 mm u M w B UNITE STATES ATE-NT Germs.

BENJAMIN MONTROSS, OF MILLERSBURG, IOXVA.

STU M P-EXTRACTO R.

SPECIFICATION forming part of Letters Patent No. 446,224, dated February10, 1891. Application filed August 23, 1890. Serial No. 362,859. (Nomodel.) I

To all whom it may concern.-

Be it known that I, BENJAMIN MoNTRoss, a citizen of theUnited States,residing at Millersburg,in the county of Iowa and State of Iowa,haveinvented certain new and usefullmprovements in Grubbing-Machines orStump-EX- tractors, of which the following is a specification.

My invention relates to improvements in that class of power appliancestechnically known to the art as grubbing-machines or stump-extractorsfor removing stumps of trees and other objects from the ground by theapplication thereto of horse or other-power; and my invention has forits object the provision of a simple, strong, and efiicient means forremoving stumps with a minimum application of power; further, to providemeans for throwing the winding-drum into and out of gear by the simpleadjustment of a lever; further, to provide mechanism for preventingretrograde rotation of the winding-drum, and, finally, to provide asimple and efficient means for connecting the pulling cable or chain tothe stump or other object without liability of becoming detachedtherefrom.

Vith these and other ends in viewmy invention consists in thecombinations of devices and novel construction and arrangement of parts,as will be hereinafter fullydescribed, and particularly pointed out inthe claims.

To enable others to understand my invention, I will now proceed to adetailed description thereof in connection with the accompanyingdrawings, in which Figure 1 is a perspective view of a stumpextractorconstructed in accordance with my invention. Fig. 2 is a verticalcentral sec tional view of the same. Fig. 3 is a transverse sectionalview on the line a; a" of Fig. 2. Fig. 4: is a detail view of thefastening appliance for securing the pulling cable or chain to the stumpor other object.

Referring to the drawings, in which like numerals of reference denotecorresponding parts in all the figures, 1 designates the base of myimproved stump-extractor, which base preferably consists of a flat pieceof board or plank of suitable dimensions, and-upon this base is securelyfastened or bolted a solid metallic bearing 2, in which is stepped orother-z wise suitably journaled the lower end of a vertical power-shaft3. This power-shaft is of suitable diameter in proportion to the strainit is to undergo and it extends above the base and metallic bearing fora suitable distance. To this vertical power-shaft are affixed twocollars 4 5, one of said collars being situated immediately above themain bearing or step 2, while the other collar 5 is located a suitabledistance above the lower collar and the main bearing, as indicated.Between these two collars is arranged the winding or power drum 6, whichis fitted loosely on the power-shaft and is free to rota-te thereonbetween said collars.

The collars are suitablysecured to the main power-shaft in a very rigidand firm manner, and in one face of the shaft is cut a longitudinal way,key-seat or groove 7, which way, groove or seat is also cut in the two001- lars, as at 8,-the key-seat in the collars being coincident withthe seat in the shaft, as shown. In this key-seat of the collars andmain shaft is fitted a movable key 9, which is adapted to move or slidefreely in said ways, seats, or grooves of the shaft and collars, andthis sliding movable key is of such length as to extend from a pointabove the upper collar to a point below or within the lower collar, thuspassing along the portion of the shaft and through the winding-drum 6.This windin g-drum is further provided on its innersurface with a seriesof three or more radial key seats or grooves 10, either one of which isadapted to align with the correspondingkey seats in the shaft andcollars, and thereby receive the adjustable key 9 when it is lowered,whereby the keyserves to rigidly couple or connect the winding-drum orthe shaft and to cause the latter to actuate or wind the drum when poweris applied to the shaft through the sweep or lever hereinafterdescribed. clear the winding-drum and lower collar, while at the sametime it remains in engagement with the main shaft and upper collar, sothat the winding-drum can turn rapidly on the shaft, which is desirablein adjusting the pulling cable or chain to the object to which it isdesired to applypower; but when the key is lowered the winding-drum isrigidly connected to the shaft to rotate therewith,

By lifting the key it is caused to" IO ing situated between theanchor-stakes and the stump or other object to which power is to beapplied, whereby the extractor is made self-adj ustin g in relation tothe parts to which 1t is connected. This anchor-shaped clevis 11 is inthe form of a Ushaped bail, and through the free ends of the arms ofsaid bail or clevis are made openings 12, which receive the collars onthe main shaft, thus loosely connecting the anchor-clevis to the mainshaft on opposite sides of the windingdrum and enabling the shaft andcollars to turn freely within the arms of the anchorclevis. This clevisalso carries a pawl or equivalent locking contrivance 18, which ex- 2 5tends outwardly from the clevis, and this pawl is adapted to engage ortake into a series of notches or ratchet-teeth 14, formed on one side ofthe winding-drum, whereby retrograde movement of the drum and the main3o shaft is prevented and the liability of accidents avoided. A limitedplay or movement of the arm of the clevis and the pawl is permitted onthe upper collar of the mainshaft to enable the pawl to clear thenotches or 5 5 teeth on the winding-drum.

The movable key 9 is connected at its upper end to the bifurcated end 15of a link or pitman 16, which is in turn connected to the free short endof an operating-lever 17, which lever is fulcrumed on a standard orother suitable support 18, fixed to the cap of the machine.

The upper end of the main power-shaft is made square or of other desiredpolygonal form, and on this polygonal end of the shaft is fitted a cap20, the lower part of which is in the form of a circular base. This capis adapted to rotate with the main shaft, and

I to the cap is rigidly secured the power lever or sweep 21, said leverfitting in a groove or between flanges on the cap and bolted rigidly tothe same. from the cap, and in it is formed a vertical slot which alignswith the key-seat in the shaft 3, so that the link or pitman from theoperating-lever to the adjustable key is free to pass and operate in theslot in'the sweep, as is obvious.

The winding-drum is provided, preferably,

with a groove or annular depression, and to this drum is secured one endof a cable or chain 23, adapted to be connected to a stump or'otherobject. This connection between the chain and the object is preferablyattained by the employment of the fastening-block 25, as shown in detailin Fig. 4: of the drawings, in which figure I have represented the blockThe sweep extends outwardly as provided with the lateral oroutwardly-extending prongs 2G and the chain 27, whereby the prongs andchain serve to rightly connect the block and pulling-cable to the stumpand to hold the block tighter to thestump as the strain on thepulling-rope increases.

This being the construction ofmy improved stump-extractor orgrubbing-machine, the operation thereof may be briefly described asfollows: The lever is raised to release the winding-drum from the mainshaft, and the pulling-rope can be readily uncoiled therefrom to enablethe block 25 to be readily fastened to a stump, &c., after which themachine is anchored to the stake or stakes by means of the rope or ropesbetween the anchor-clevis 11 and said stakes. The lever is lowered torigidly couple the winding-drum to the power-shaft and power by horsesor other suitable source applied to the'sweep to rotate the cap and mainshaft, and through said shaft to turn the winding-drum and strain thecable or chain, so as to draw the stump out of the ground. Retrogrademovement of the parts is prevented by the pawl-' and-ratchet mechanismshould the machine be temporarily stopped, and the parts thrown out ofgear simply by depressing the lever, which elevates the key andwithdraws the same from the winding drum.

The parts are simple, strong, and durable in construction, and themachine as an entirety is efficient and reliable in operation and exertsa maximum force with a minimum expenditure of power.

Modifications in the form and proportion of parts can be made Withoutdeparting from the spirit of my invention.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

1. The combination of a grooved powershaft having rigid collars, awinding-drum lars and provided with the interior key way or ways, ananchor-clevis fitted loosely on the collars of the shaft, a movable key9, fitted in the groove in the power-shaft and adapted to fit in one ofthe keyways of the windingdrum, and a lever linked to the movable keyfor withdrawing the same from engagement with the winding-drum,substantially as described.

2. The combination of a grooved powershaft provided with the rigidcollars, a winding-drum fitted loosely on said shaft between the collarsand provided with the notches 01" teeth, an anchor-clevis fitted looselyon the shaft and having the pawl adapted to engage the notches or teethof the winding-drum, the movable key, and a sweep attached to thepower-shaft, substantially as described.

The combination of a base, a main bearing thereon, a verticalpower-shaft stepped in said bearing and provided with the longitudinalkey way or seat and the grooved col-- lars, a winding-druin looselyfitted on the fitted loosely on the shaft between said 001- o and havingthe locking-pawl adapted to engage the notches o'r teeth on theWindingdrum, and the pulling rope or chain attached to the drum, for thepurpose described, substantially as set forth.

In Witness whereof I hereunto set my hand I 5 in the presence of twoWitnesses.

BENJAMIN MONTROSS.

Vitnesses:

ILL N. SARGENT, M.- T. FITZGERALD.

